Respuesta :

Answer: x= 25

Step-by-step explanation:

28+47+ y(some number)= 180

solve for y to get 75 and since 75=3x x=25

Answer:

x=45

Step-by-step explanation:

a line = 180

47 + 28 = 75

180-75= 105

105+ 3x =180

now solve for x

3x + 105  =180  

3                 3

x + 105 = 60

x= 45